1,398 research outputs found
Tonic and Rhythmic Spinal Activity Underlying Locomotion
No full textIvanenko YP, Gurfinkel VS, Selionov V, et al. Tonic and Rhythmic Spinal Activity Underlying Locomotion. Current Pharmaceutical Design. 2017;23(12):1753-1763
Heptnerina Ivanenko & Defaye 2004, n. gen.
No full textGenus Heptnerina n. gen. TYPE SPECIES. — Heptnerina confusa n. sp. ETYMOLOGY. — The new generic name derives from the family name of the marine biologist Mikhail V. Heptner (1940-2002), collaborator and teacher of the first author. DIAGNOSIS. — First pedigerous somite free, concealed laterally beneath posterior outgrowth of cephalosome. Paragnath armed with four setae. Caudal ramus with seven setae, seta I short. Antennule of female 10- segmented, with subdivided third, fourth and fifth segments; antennule of male 17-segmented. Antenna with two long exopodal setae. Mandibular palp with two-segmented endopod and four-segmented exopod; distal segment with two setae, one shorter and with setules on tip. Maxillule with exopod bearing four setae, one shorter and with setules on tip. Maxilla with praecoxa and coxa separated by arthrodial membrane posteriorly. Maxilliped composed of seven segments: praecoxa with two endites armed with one and three setae; coxa and basis each with one endite armed with two strong setae; four-segmented endopod with setal formula 0, 0, 1, 4. Legs 1-4 with three-segmented rami; spine and seta formula as for type species. Endopod of leg 4 with three particularly robust setae (two setae on second segment and proximal seta of third segment). Fifth leg with intercoxal plate, and with protopod armed with external seta. Exopod of female leg 5 one-segmented, bearing two spines and one seta; exopod of male leg 5 one-segmented with two additional internal setae. Short segment-like endopodal structure of leg 5 in female present or absent. Sixth leg with three setae in both sexes.Published as part of Ivanenko, Viatcheslav N. & Defaye, Danielle, 2004, A new genus and species of deep-sea cyclopoid (Crustacea, Copepoda, Cyclopinidae) from the Mid-Atlantic Ridge (Azores Triple Junction, Lucky Strike), pp. 49-64 in Zoosystema 26 (1) on page 51, DOI: 10.5281/zenodo.540137
Artificial intelligence as a mechanism for calculating the cost of construction projects
No full textIvanenko D. Artificial intelligence as a mechanism for calculating the cost of construction projects / D. Ivanenko // Тиждень науки-2023. Факультет будівництва, архітектури та дизайну. Тези доповідей науково-технічної конференції, Запоріжжя, 24-28 квітня 2023 р. / Редкол. : В. Шаломєєв (відпов. ред.) Електрон. дані. – Запоріжжя : НУ «Запорізька політехніка», 2023. – С. 12-14
On the origin of planar covariation of elevation angles during human locomotion
No full textLeg segment rotations in human walking covary, so that the three-dimensional trajectory of temporal changes in the elevation angles lies close to a plane. Recently the role of central versus biomechanical constraints on the kinematics control of human locomotion has been questioned. Here we show, based on both modeling and experimental data, that the planar law of intersegmental coordination is not a simple consequence of biomechanics. First, the full limb behavior in various locomotion modes (walking on inclined surface, staircase stepping, air-stepping, crouched walking, hopping) can be expressed as 2 degrees of freedom planar motion even though the orientation of the plane and pairwise segment angle correlations may differ substantially. Second, planar covariation is not an inevitable outcome of any locomotor movement. It can be systematically violated in some conditions (e. g., when stooping and grasping an object on the floor during walking or in toddlers at the onset of independent walking) or transferred into a simple linear relationship in others (e. g., during stepping in place). Finally, all three major limb segments contribute importantly to planar covariation and its characteristics resulting in a certain endpoint trajectory defined by the limb axis length and orientation. Recent advances in the neural control of movement support the hypothesis about central representation of kinematics components
Smacigastes Ivanenko & Defaye
No full textGenus Smacigastes Ivanenko & Defaye Type species Smacigastes barti sp. nov. Type material Holotype dissected Ψ, 19 slides (nr. SMF 31411) Paratype 1: dissected ɗ, 13 slides (nr. SMF 31412) Paratype 2: Ψ (nr. SMF 31413) Paratype 3: ɗ (nr. SMF 31414) Paratype 4: Ψ (nr. SMF 31415) Paratype 5: ɗ (nr. SMF 31416) Paratype 6: Ψ (nr. SMF 31417) Paratype 7: ɗ (nr. SMF 31418) Paratype 8: dissected copepodite stage V, 3 slides (nr. SMF 31419) Paratype 9: Ψ (nr. OLML 2007 / 199) Paratype 10: ɗ (nr. OLML 2007 / 200) Paratype 11:Ψ (nr. OLML 2007 / 201) Paratype 12: ɗ (nr. OLML 2007 / 202) Paratype 13: copepodite stage V (nr. OLML 2007 / 203) Type locality East Pacific Rise (EPR); 9 ° 50.447´N, 104 ° 17.493´W; 2500 m depth. The site Tica is located on the EPR between the Clipperton and Sequeiros transform faults. The site was colonized by the giant tubeworm Riftia pachyptila in 1997 (Fornari et al. 2004). Type material was collected from artificial substrates (PVC hoses) deployed in 2002, and recovered one year later (see Govenar & Fisher 2007). Etymology The species is named in honor of Breea Govenar who designed the artificial devices from which specimens were collected (BART: Breea´s Artificial Riftia Tubes). Female Body (Fig. 1 a, 1 b, 2 a) laterally compressed, weakly chitinized, with short sensilla and few pores. Total length of female holotype (rostrum to posterior margin of telson) 420 µm, greatest width 180 µm. Rostrum rounded and prominent (Fig. 1 a). Prosome 4 segmented (cephalothorax and 3 somites bearing legs 2 to 4) (Fig. 2 a). Urosome (Fig. 2 b) 5 segmented: first urosomite with leg 5, genitaldouble somite with ventral depression and one gonoporus covered by flap of the minute leg 6 (Fig. 1 c, 5 b, 5 c), and 2 postgenital somites plus telson with furca. Furca 3 times as long as wide, with 7 setae of different length (Fig. 2 c). Antennule (Fig. 2 d) 7 segmented; formula of setation: 1, 10, 9, 3 +aesthetasc, 6, 4, 6 +aesthetasc. Antenna (Fig. 2 e) with small coxa and elongate basis with 1 seta and a field of cuticular spinules. Exopod 2 segmented, proximal segment with 1 inner setae, distal segment with 3 apical setae; endopod 2 segmented, proximal segment with 1 median seta, distal segment with 4 inner setae, 6 terminal setae and a hyaline frill subdistally on outer margin. Labrum (Fig. 2 a) projecting over shield of cephalothorax in lateral view. Mandible (Fig. 3 a) with gnathobase (not shown); palp 2 segmented, with 2 distal setae on basis and 1 segmented endopod bearing 1 outer and 3 terminal setae. Maxillule (Fig. 3 b, c) with praecoxal arthrite bearing 8 spines; coxal endite with 1 seta; exopod with 2 setae; basis elongate with 1 median and 4 terminal setae. Maxilla (Fig. 3 d) syncoxa with two endites, proximal endite with 1, distal endite with 3 spines. Allobasis with 3 lateral setae, two subdistal and one apical spine. Maxilliped (Fig. 3 e, f) 3 segmented, subchelate; syncoxa elongated with 1 distal seta; basis with 2 rows of spinules; endopod 1 segmented, produced into a strong claw, with 2 proximal setae and an inner row of short spinules. Swimming legs 1–4 biramous; armature formula as in Table 1. FIGURE 2. Smacigastes barti sp. nov. Ψ holotype LM drawings: A, habitus, lateral (labrum indicated by arrow); B, urosome, ventral; C, furca, ventral; D, antennule (a seta on 2 nd segment broke and is indicated by a circle); E, antenna (frill indicated by arrow). Scale bars A 100 µm; B–E 50 µm. Leg 1 (Fig. 4 a) with 1 segmented rami. Leg 2 and leg 3 (Fig. 4 b, 4 c) with 3 segmented endopods and 2 segmented exopods; proximal segments of exopods elongated, derived by fusion of former proximal and middle segments. Leg 4 (Fig. 4 d) with 3 segmented rami. Distal exopod segment with an inner seta slightly modified into a spine (Fig. 5 a). Leg 5 (Fig. 5 b) with baseoendopod and exopod; baseoendopod with 1 basal outer seta, 3 inner setae, 1 terminal spine, and 1 small terminal outer seta; exopod with 3 outer elements (proximal setalike; middle and distal ones spinelike), and 2 terminal spines. Leg 6 a small flap with 1 minute seta (Fig. 5 c). Single egg sac with three eggs, located ventrally between fifth legs (Fig. 1 b, 1 c, 2 a). Male differs from female in the following: Length of paratype 1 (Fig. 1 d, 6 a) 325 µm; greatest width 150 µm. Genitaldouble somite (Fig. 1 e, 5 e) produced ventrally into a large, elongated prominence bearing a distally asymmetrical genital flap representing leg 6. Antennule (Fig. 6 b) 10 segmented; setation formula as follows: 1, 10, 6 +aesthetasc, 1, 7 +aesthetasc, 1, 2, 1, 4, 7 +aesthetasc. Leg 5 (Fig. 5 d) 2 segmented; basis with 1 outer seta, exopod with 1 outer proximal seta, 1 outer subdistal spine, and 2 terminal spines. Leg 6 (Fig. 1 e, 5 e) a membranous genital flap on the left side. One spermatophore stored inside the genitaldouble somite (Fig. 5 e). Copepodite stage V Leg 2 (Fig. 6 c) and Leg 3 (Fig. 6 d) consist of 3 segmented exopods (in contrast to adult) and 2 segmented endopods (shortly before division into the adult 3 segmented endopod).Published as part of Gollner, Sabine, Ivanenko, Viatcheslav N. & Arbizu, Pedro Martinez, 2008, A new species of deepsea Tegastidae (Crustacea: Copepoda: Harpacticoida) from 9 ° 50´N on the East Pacific Rise, with remarks on its ecology *, pp. 323-326 in Zootaxa 1866 on pages 324-332, DOI: 10.5281/zenodo.18374
Lightweight stream ciphers for green IT engineering
No full textAt the moment the most widely used are symmetric cryptographic transformations, in particular, stream ciphers. The development of an efficient synchronous stream cipher is reduced to the construction of a pseudo-random sequence generator with defined cryptographic properties. It should be noted that in devices with limited computing power, low volume and low power consumption the implementation of reliable cryptographic methods is extremely complicated. Limited physical parameters, low power consumption, low computing power and other characteristic attributes of “green” IT engineering forces the use of new approaches for designing cryptographic protection tools. The main cryptographic transformations are considered and experimental studies of performance and statistical security are conducted. We propose new methods and hardware and software tools for lightweight stream encryption that meet the current requirements of “green” IT engineering. It is proposed synthesis method for the construction of nonlinear-feedback shift register, which allows creating nonlinear registers with design features that correspond to the certain predefined criteria
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